Address the letter to the director of the college's office of admissions. To increase your letter's effectiveness, address yourself to a particular person and not to a department in general.
Introduce yourself. Provide background information and details about your recent application, which was denied. Urge the admissions director to reconsider your application and describe the benefits you would receive from a college education.
List the reasons the college gave for rejecting your application. Explain why the college should reconsider, and include information to address concerns the college cited in its rejection letter. If the rejection happened because of an event from the past, thoroughly explain the circumstances and assure the admissions director that it will not happen again. Explain how you plan to avoid those situations.
Ask directly and clearly for the admissions office to reconsider your application. Give clear reasons why this reconsideration is necessary.
Emphasize that you plan to follow up on the reconsideration decision. Thank the director for reading the letter and state that you look forward to hearing from the college. Use a closing such as "Sincerely," followed by your full name.
Include your mailing address, phone number and email address so that the college can contact you about the reconsideration.